The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2012
Filed:
Jul. 14, 2008
Hideki Matsuyama, Kanagawa, JP;
Masayuki Daito, Kanagawa, JP;
Hideki Matsuyama, Kanagawa, JP;
Masayuki Daito, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Abstract
A filter operation circuit of a microprocessor executes an IIR filter operation by using data provided from registers Rto Rand outputs one sample of data Y[n] subjected to filter operation and transfer data P[n] to be used in the next IIR filter operation. Register Rprovides filter coefficients to the filter operation circuit. Register Rprovides past transfer data P[n−1] and P[n−2] to the filter operation circuit and is overwritten and updated with new transfer data P[n] output from the filter operation circuit. Register Rholds multiple samples of data X[n] to X[n+3] to be subjected to filter operation and provides X[n] to the filter operation circuit. An area of register Rin which X[n] has been held is overwritten and updated with Y[n].